Si Photonic Wire Waveguide Devices

Yamada, Hirohito; Chu, Tao; Ishida, Shintaro; Arakawa, Y.

doi:10.1109/jstqe.2006.880611

Cited by 149 publications

(49 citation statements)

References 26 publications

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“…Because Si has very large thermo-optical coefficient (∼1.86 × 10 −4 [K −1 ]), some optical devices based on thermooptical (TO) effect have been proposed using Si wire waveguide [4]. However, the variation of refractive index of Si which is brought by thermo-optical effect degrades the characteristics of some optical devices such as conventional directional coupler; the coupling efficiency varies with the temperature.…”

Section: Temperature Dependencementioning

confidence: 99%

Reduction of Wavelength Dependence of Coupling Characteristics Using Si Optical Waveguide Curved Directional Coupler

Morino

Minamikawa

Iiyama

2014

J. Lightwave Technol.

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Directional couplers are widely used as one of the key components of optical integrated circuits. However, the coupling efficiency of the conventional directional coupler is highly sensitive to wavelength. This sensitivity degrades the characteristics of devices that contain directional couplers for wavelength division multiplexing transmission. A curved directional coupler has been proposed using silica optical waveguide as one of the coupler which realize wavelength insensitive, small footprint and tolerant to fabrication. In this paper, we theoretically investigated this curved coupler using Si wire waveguide and got results that the curved coupler whose bending radius of 21 μm and coupling length of 7.40 μm can reduce the wavelength dependence and achieve about a sevenfold enhancement of operational bandwidth in the transmittance variation range of −3 ± 0.1 dB compared with conventional directional coupler.

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Section: Temperature Dependencementioning

confidence: 99%

Reduction of Wavelength Dependence of Coupling Characteristics Using Si Optical Waveguide Curved Directional Coupler

Morino

Minamikawa

Iiyama

2014

J. Lightwave Technol.

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“…This makes the Si-nanowire-based PLCs highly polarization-sensitive. One can use a square Si nanowire (e.g., 300 nm×300 nm [47]) to obtain a polarization-independent Si nanowire. However, the scattering loss is usually much larger than that for a 500 nm×250 nm Si nanowire [14,15] and it is difficult to control the width and height very precisely.…”

Section: Characteristics Of Si Nanowiresmentioning

confidence: 99%

Ultrasmall integrated devices based on silicon nanowires for optical communications

Dai

2008

J. Nanophoton

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Planar lightwave circuits (PLCs) based on Si nanowires exhibit several serious problems due to the small cross sections of the nanowires. These problems include large scattering loss, large coupling loss to a single-mode fiber, and high dependency on polarization. Several solutions to these problems have emerged. Recent progress on Si-nanowire-based passive PLC devices encompasses arrayed waveguide grating (de)multiplexers, microring resonators, and multimode interference couplers.

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“…Recently, a great deal of research has been carried out in silicon photonics, since the use of silicon enables dense integration and low cost fabrication of various optical circuits using CMOS-compatible processes [1,2,3]. On the other hand, silicon wire waveguides have polarization dependent loss (PDL), and polarization dependent wavelength characteristics [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch

Sugiyama

Chiba

Tanizawa

et al. 2017

IEICE Electron. Express

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We propose a compact polarization diversity circuit for a silicon waveguide device. It consists of silica waveguides and photonic crystal waveplates, and can convert input light with various polarization states into two output light signals with the same polarization. Setting these circuits at the front and rear of two silicon optical switches, the polarization dependence in the switch can be dramatically suppressed. We fabricated polarization diversity circuits for a 4×4 silicon optical switch and realized a polarization insensitive 4×4 optical switch. The polarization dependent loss was reduced to 1.1 dB and the polarization dependent crosstalk was less than −17 dB.

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Si Photonic Wire Waveguide Devices

Cited by 149 publications

References 26 publications

Reduction of Wavelength Dependence of Coupling Characteristics Using Si Optical Waveguide Curved Directional Coupler

Reduction of Wavelength Dependence of Coupling Characteristics Using Si Optical Waveguide Curved Directional Coupler

Ultrasmall integrated devices based on silicon nanowires for optical communications

Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch

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